Just bought a new boat and trailer and the trailer doesnt have a spare. I looked at Academy and found the tire/wheel combo that i need (ST175 80D13) for $89. Is that a good price? I checked wally world but they dont carry a 13" trailor tire. Also, how do you carry it around? Is there someway to attach the spare tire/wheel to the trailer some where? A bolt on kit to do this? The boat/trailer combo is a Tracker Pro Team 170 TX.